Light Fidelity: A future of wireless communication

Kuttan, Deepak B; Kaur, Satwinder; Goyal, Bhawna; Dogra, Ayush

doi:10.1109/icosec51865.2021.9591685

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…Li-Fi technology utilizes light as a medium for transmitting information, adhering to the visible light communication (VLC) standard [4], which operates at a wavelength of 375 nm to 780 nm by following the IEEE 802.15.7 standard [5,6]. Li-Fi has a wide range of applications, including smart rooms and smart cities, Internet of Things (IoT), communication connections in airplanes, patient monitoring, traffic control, disaster management, education or schools, and military [7][8][9][10][11][12][13]. Li-Fi technology is anticipated to emerge as an ecofriendly, more cost-effective alternative to wireless fidelity (Wi-Fi) technology [4], especially for indoor use [1].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Optical Channel Multiplexing System on Indoor Light

2024

IJIES

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Li-Fi technology faces a critical challenge in achieving line-of-sight (LOS) connectivity while also optimizing bandwidth efficiency for high-speed data transmission. To address these issues, this research introduces a channel multiplexing model for Light Fidelity (Li-Fi) communication, employing movable LED panels. The study evaluates the model's performance by varying channel number, transmitter half-angle values, and field of view (FOV) parameters over a 3 to 5-meter transmission range. Results demonstrate that the proposed Light Fidelity indoor multiplexing model excels with an inter-channel spacing of 25 nm, particularly for Mux 2x2 and Mux 4x4 schemes. Longer-wavelength channels exhibit lower bit error rates (BER) and superior Q-factor values compared to others. Reliable performance within the 3 to 5-meter range is achieved with transmitter half-angle values of 30 0 and 45 0 , enhanced by adopting a higher Lambertian order value (m>1) to ensure signal quality with a superior signal-tonoise ratio (SNR). Additionally, employing a FOV of 30 0 solely complies with the optical communication standard (BER < 10-12) for distances spanning 3 to 5 meters.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of Optical Channel Multiplexing System on Indoor Light

2024

IJIES

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“…VLC is a data communication medium that uses visible light with a frequency between 400 THz (780 nm) and 800 THz (375 nm) as an optical carrier data transmission using rapid light pulses to transmit information signals wirelessly [4]. Li-Fi follows the VLC standard, namely the IEEE 802.15.7 standard which has three types of physical layer (PHY) where the operating range of PHY I is from 11.67 kb/s up to 266.6 kb/s, PHY II is from 1.25 Mb/s up to 96 Mb/s, and the PHY III is 12 Mb/s up to 96 Mb/s [5], respectively.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Indoor Light Fidelity Technology Propagation Using Fixed and Movable LED Panels

2023

IJIES

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Light fidelity (Li-Fi) offers communication services with a wide bandwidth and is one of the options for telecommunications services in the future, especially indoor communication. However, Li-Fi requires accurate device positioning for line of sight (LOS) conditions to meet the main requirement for light communication. Conventional Li-Fi design models require a more dynamic transmitter and receiver device settings but can still serve LOS communication well. This study aims to design a Li-Fi communication model by varying the transmitting devices, such as the use of fixed and movable LEDs, and receiving devices, such as the addition of optical rectangle filters, low-pass filters, and trans-impedance amplifiers. The focus of observation includes the effect of changes in wavelength, data transmission speed, transmitter half-angle, irradiance angle, and incidence angle, as well as field of view (FOV) on received power parameters, signal-to-noise ratio, Q-factor, and bit error rate (BER). On the basis of the test results, the performance of all wavelength variations meets the ITU-T standard up to a variation of the transmission distance of 8 m, where the use of fixed and movable LEDs does not result in a significant difference in performance. The test results indicate that the wavelength parameter affects the signal quality due to the spectral response and LEDs emission. For short distances, the wavelength of 450 nm has better performance, whereas for distances up to 8 m, the wavelength of 650 nm has a better performance than other variations. Furthermore, increasing the transmitter half-angle increased the BER value and drastically decreased the Q factor. The use of a smaller FOV is recommended, as shown from the increase in distance resulting in a significant decrease in performance. The proposed system model can also be used for bit rates up to 30 Mbps, although it is only reliable up to 6 m. As for the 40 Mbps variation, the 75° half-angle transmitter, 60° FOV, and 90° FOV variations do not meet the standard. The two system models do not have a significant difference in performance. Thus, using movable LED instead of fixed LED will make the system more dynamic with a well-maintained LOS.

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“…Optical communication, also named as Light Fidelity (LiFi), is no doubt one of the most compelling wireless communication technologies for high-speed and largecapacity data communication without external electromagnetic interference and safety issues 1,2,3,4 . Moreover, visible (Vis) -infrared (NIR) light have frequencies extending from 400 Terahertz (THz) to 800 THz, offering 10,000 times higher available frequency spectrum than the current radio frequency 5,6 .…”

Section: Introductionmentioning

confidence: 99%

High-Speed Flexible Near-Infrared Organic Photodiode Beyond Silicon for Optical Communication

Zhu

Chen

Han

et al. 2023

Preprint

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Optical communication is a particularly compelling technology to tackle the speed and capacity bottlenecks in data communication in modern society. Currently, silicon photodetector plays a dominant role in the high-speed optical communication across the visible-near infrared spectrum. However, its intrinsic rigid structure, high working bias, and low responsivity largely limit its applications in the next-generation flexible optoelectronic devices. Herein, we report a solution-processed flexible organic photodetector (OPD) based on a narrow-bandgap nonfullerene acceptors, which exhibits a remarkable response time of 91 ns and peaking responsivity of 0.53 A W-1 (λ = 830 nm) at zero bias, exceeding the values obtained in the state-of-the-art high-speed commercial Si photodetector (326 ns; 0.26 A W-1). This exceptional performance benefits from the low parasitic capacitance and high charge mobility due to low trap states and energetic disorder in the organic photoactive film. More significantly, the flexible OPD exhibits negligible performance attenuation (<1%) after bending for 500 cycles, and maintain 96% of its initial performance even after 550 h of indoor exposure. Furthermore, it also demonstrates a high data transmission rate of 80 MHz with a with a bit-error-rate of 3.5×10-4, offering great potential in next-generation high-speed flexible optical communication system.

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Light Fidelity: A future of wireless communication

Cited by 4 publications

References 21 publications

Performance Analysis of Optical Channel Multiplexing System on Indoor Light

Performance Analysis of Optical Channel Multiplexing System on Indoor Light

Performance Analysis of Indoor Light Fidelity Technology Propagation Using Fixed and Movable LED Panels

High-Speed Flexible Near-Infrared Organic Photodiode Beyond Silicon for Optical Communication

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